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Nucleobases

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Space harbors life’s ingredients: nucleobases and amino acids found, but DNA and RNA remain undetected
space8 days ago

Space harbors life’s ingredients: nucleobases and amino acids found, but DNA and RNA remain undetected

Space has yielded nucleobases—the building blocks of DNA and RNA—and amino acids on the asteroid samples Bennu and Ryugu, along with more than a dozen prebiotic molecules detected in molecular clouds; of about 350 detected space molecules, roughly 180 are complex organic molecules. DNA and RNA themselves have not been found in space, but detections of sugars like erythrulose and other organics suggest the basic ingredients of life can form in space, potentially even before stars and planets, with future missions aiming to uncover larger molecules like ribose or RNA.

via Live Science|
#amino-acids#bennu#nucleobases
Asteroid Ryugu Carries All Five DNA Bases, Suggesting Spaceborn Prebiotic Chemistry
science3 months ago

Asteroid Ryugu Carries All Five DNA Bases, Suggesting Spaceborn Prebiotic Chemistry

Researchers analyzing asteroid Ryugu samples from JAXA’s Hayabusa2 mission found all five DNA/RNA nucleobases (adenine, guanine, cytosine, thymine, uracil), indicating these building blocks are widespread in the solar system. Published in Nature Astronomy (March 16, 2026), the finding suggests spaceborne prebiotic chemistry could have delivered life's ingredients to early Earth, but it does not prove extraterrestrial life.

via The Daily Galaxy|
#astrobiology#nucleobases#ryugu
Ryugu Reveals the Full Alphabet for DNA and RNA
science4 months ago

Ryugu Reveals the Full Alphabet for DNA and RNA

Researchers analyzing asteroid Ryugu samples discovered all five canonical nucleobases—adenine, cytosine, guanine, thymine, and uracil—in roughly equal amounts, the first time these DNA/RNA letters have been found together in a single extraterrestrial material, reinforcing the idea that prebiotic molecules were common in the early solar system and could have been delivered to Earth by meteorites.

via Eos - Science News by AGU|
#astrobiology#hayabusa2#nucleobases
Ryugu's Dust Carries All Nucleobases, Hinting at Cosmic Origins of Life
science5 months ago

Ryugu's Dust Carries All Nucleobases, Hinting at Cosmic Origins of Life

Analysis of Ryugu samples from JAXA’s Hayabusa2 mission finds all five nucleobases—uracil, adenine, guanine, cytosine, and thymine—the DNA/RNA building blocks, suggesting primitive asteroids can form and preserve prebiotic molecules and potentially deliver them to Earth, though this does not imply life existed on Ryugu; similar organics were found in Bennu samples, underscoring the ubiquity of these building blocks in the solar system.

via Futurism|
#astrobiology#nucleobases#prebiotic-chemistry
Asteroids Harbor All Five Nucleobases, Advancing Space Chemistry Clues to Life’s Origins
science5 months ago

Asteroids Harbor All Five Nucleobases, Advancing Space Chemistry Clues to Life’s Origins

New high-sensitivity analyses of asteroid samples confirm all five nucleobases (A, C, G, T, U) in Ryugu, adding to prior Bennu detections and resolving earlier Ryugu results. The finding reinforces the idea that space-based chemistry can produce nucleotides and informs potential prebiotic pathways, though it does not imply life, and contamination concerns are addressed. The study also notes a correlation between purine/pyrimidine levels and ammonia across asteroids, offering clues about the reactions that could occur in space and feed theories on how Earth's life's building blocks arrived.

via Ars Technica|
#asteroids#nucleobases#origins-of-life
DNA’s five letters detected on asteroid Ryugu, hinting at universal prebiotic chemistry
science5 months ago

DNA’s five letters detected on asteroid Ryugu, hinting at universal prebiotic chemistry

Analysis of asteroid Ryugu samples from JAXA’s Hayabusa2 mission revealed a complete set of canonical nucleobases (adenine, guanine, cytosine, thymine, uracil), suggesting carbonaceous asteroids can carry DNA/RNA building blocks and may contribute to prebiotic chemistry across the solar system; findings align with previous Bennu results and meteorites, though they do not indicate life on Ryugu.

via Yahoo|
#carbonaceous-asteroids#hayabusa2#nucleobases
Ryugu asteroid yields DNA and RNA building blocks, study finds
astronomy5 months ago

Ryugu asteroid yields DNA and RNA building blocks, study finds

Two samples from asteroid Ryugu returned by JAXA’s Hayabusa2 contain the five nucleobases adenine, guanine, cytosine, thymine and uracil—the building blocks of DNA and RNA. The find suggests these compounds can form in space without life and may have been distributed across the early solar system, with Ryugu showing different base concentrations than Bennu and meteorites, hinting at diverse formation histories and a wide cosmic availability of life's chemical ingredients.

via Space|
#astronomy#dna#hayabusa2
Ryugu Samples Show All Five Nucleobases, Hinting Life’s Ingredients Arrived from Space
space-and-spaceflight5 months ago

Ryugu Samples Show All Five Nucleobases, Hinting Life’s Ingredients Arrived from Space

A Nature Astronomy study analyzing Hayabusa2’s Ryugu samples found all five nucleobases—the DNA/RNA building blocks—supporting the idea that asteroids delivered the ingredients for life to early Earth. The researchers note Ryugu has roughly equal amounts of purine and pyrimidine bases, unlike some meteorites, and that ammonia concentration may influence nucleobase formation, suggesting such molecules could have been more widespread in the early solar system.

via Gizmodo|
#astrobiology#hayabusa2#nucleobases
Ryugu Samples Show All Five Canonical Nucleobases, Pointing to Common Prebiotic Chemistry in the Solar System
space5 months ago

Ryugu Samples Show All Five Canonical Nucleobases, Pointing to Common Prebiotic Chemistry in the Solar System

Two Ryugu aggregates contain all five canonical nucleobases (adenine, guanine, cytosine, thymine, uracil) plus related N-heterocycles, supporting extraterrestrial delivery of basic life-building blocks. The study finds purine/pyrimidine ratios that correlate with ammonia levels and differ from Bennu, Orgueil, and Murchison, suggesting different parent-body chemistries but a shared formation pathway for nucleobases on primitive Solar System bodies and implications for Earth's prebiotic inventory.

via Nature|
#astrochemistry#meteorites#nucleobases
Life's building blocks found on asteroid Ryugu, hinting at extraterrestrial origins.
science-and-astronomy3 years ago

Life's building blocks found on asteroid Ryugu, hinting at extraterrestrial origins.

Samples from the asteroid Ryugu have provided evidence that the organic building blocks for life on Earth came from space. Researchers have discovered concentrations of uracil, one of the four nucleobases of RNA, in the samples, confirming that nucleobases are present in pristine asteroidal material dating back to the earliest days of the solar system. The discovery is a step towards understanding the origin of life and whether the processes that led to the appearance of life on Earth can be repeated elsewhere in the universe.

via Space.com|
#asteroid-ryugu#extraterrestrial-life#nucleobases